Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



James P. Smith, Jr., except as specified

Annual to bamboo-like; roots generally fibrous
Stem generally round, hollow; nodes swollen, solid
Leaves alternate, 2-ranked, generally linear; sheath generally open; ligule membranous or hairy, at blade base
Inflorescence various (of generally many spikelets)
Spikelet: glumes generally 2; florets (lemma, palea, flower) 1–many; lemma generally membranous, sometimes glume-like; palea generally ± transparent, ± enclosed by lemma
Flower generally bisexual, minute; stamens generally 3; stigmas generally 2, generally plumose
Fruit: achene-like grain
Genera in family: 650–900 genera; ± 10,000 species: worldwide; greatest economic importance of any family (wheat, rice, maize, millet, sorghum, sugar cane, forage crops, ornamental, weeds; thatching, weaving, building materials)
Reference: [Hitchcock 1951 Manual grasses US, USDA Misc Publ 200; Clayton & Renvoise 1986 Kew Bull Add Series 13]
See Glossary p. 26 for illustrations of general family characteristics. Generally wind-pollinated.


Mary E. Barkworth

Perennial, cespitose or from rhizomes
Stem erect
Leaves basal and cauline; ligule membranous; uppermost blade generally widely spreading
Inflorescence spike-like; spikelets ± 2-ranked, 1 per node, each spikelet partly overlapping spikelet on opposite side of axis, not overlapping spikelets on same side but not adjacent
Spikelet: glumes < or = lower floret, lanceolate, stiffly membranous, acute to obtuse, awn 0; axis breaking above glumes and between florets; lemma awn terminal, strongly spreading or 0; anthers 4–8 mm
Species in genus: 19 species: arid temp Eurasia, North America
Etymology: (Greek: false roegneria, earlier name for Elymus )
Reference: [Carlson 1986 MS Thesis, OR State Univ]
Segregated from Agropyron.

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